Patrick Lantschner is Associate Professor in the Department of History at University College London. He works on cities and political order across Europe, and the Mediterranean world in the Middle Ages. His book The Logic of Political in Medieval Cities: Italy and the Southern Low Countries, 1370–1440 (2015) won the 2016 Bronisław Geremek Prize for outstanding first book. Maarten Prak was, until his retirement in 2021, Professor of Social and Economic History at the Department of History and Art History, Utrecht University. He is an expert on the Middle Ages and the Early Modern period, particularly the Dutch Golden Age. He is the author of Citizens without Nations: Urban Citizenship in Europe and the World c. 1000–1789 (2018).